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28 lines
360 B

package main
import (
"fmt"
"os"
)
func main() {
if len(os.Args) == 2 {
for _, r := range os.Args[1] {
if r >= 'a' && r <= 'z' {
if r >= 'a'+13 {
r -= 13
} else {
r += 13
}
} else if r >= 'A' && r <= 'Z' {
if r >= 'A'+13 {
r -= 13
} else {
r += 13
}
}
fmt.Printf("%c", r)
}
fmt.Println()
}
}